class Common {
  factory Common(){
    final _instance = Common._();
    return _instance;
  }
  Common._();

  checkChinaPhone(phone){
    return new RegExp('^((13[0-9])|(15[^4])|(166)|(17[0-8])|(18[0-9])|(19[8-9])|(147,145))\\d{8}\$').hasMatch(phone);
  }
}